Link



June 9, 1925. n 1,540,923

J. M. BLAIR LINK Filed June 13 1924 GUM new Patented June 9, 1925.

P All E anni? n. ripara. or ruinas LINK.

Application filed June i3,

To all fun/"mm t may concern Be it known that I, JEFF BLAIR, a citizenot the United States, residing at I-Iumble, in the county o' Harris and State of Texas, have invented certain new and useful Improvements in a Link, of which the following is a specification.

This invention relates to new and useful improvements in linkswhich are principally adapted 'for use in connection with traveling blocks which are provided with a hook, the blocks being principally used in oil iields.

`One of the improtant objects of the present invention is to provide a link ot' the above mentioned character, which will save considerable time and labor in changing from a hook to a swivel connection such as is commonly done in connection with the implements used in drilling oil.

A further object of the present invention is to provide a link of the above mentioned character, wherein locking means is provided for closing the open portion of the link after the hook or swivel has been suspended therein, means being further provided or preventing the looking means from automatically or accidentally becoming unlocked. K

A still further object of the invention is to provide a link of the above mentioned character, which is simple in construction, inexpensive, strong and durable and furthermore adapted for the purposes for which it is designated.

Other objects and advantages of this invention will become apparent during the course of the following description.

In the accompanying drawing forming i part of this speciiication and in which like numerals designate like parts throughout the same: 1

Figure l is a side elevation of my improved link showing the same in a locked position, and

Figure 2 is an e-dge view thereof.

In the drawing wherein for the purpose of illustration is shown the preferredv embodiment ot my invention, the numeral l designates generally my link which is formed of any suitable metallic material and is preferably C-shaped in design in the manner illustrated in Figure 1.` The lower free end 2 of the C-shaped link l is provided with a laterally extending lip 3, the purpose of which will be hereinafter more fully described. A pair of plates such as shown at ieee. ne. 719,370.

sides of the upper free end oi" the link in the manner clearlyvillustrated in Figure 2.

The lower ends o'tthe plates 4 and are adapted to 'extend over the lateral lip 3 on opposite sides oi the lower tree end 2 of the link and pivotally.supported between the lower end of the plates is the latch memberrS. The latch member 8 is provided with a laterally extending projection 9 on its opposite sides for operation with suitable apertures provided in the lower ends of the plates 4 and 5 in the manner clearly illus-v trated in Figure 2 ot' the drawing whereby the latch may be pivotally supported vbetween the lower free ends of the plates. The latch member is adapted to engage the under portion of the lip 3 in the manner clearly illustrated and the lower end of the latch terminates into a handle l() whereby the same may be actuated whenever necessary.

For the purpose of securing the latch 8 in engagement with the lip 3, I provide the plate 4 with a notch 11 in one side thereof in the manner clearly illustrated in Figure l of the drawing and adapted to be received in the notch l1 is the locking dog l2 which is pivoted at 13 on the lower free end 2 of the C-shaped link. The parts are arranged as is shown in Figure l of the drawing, thekspace between the free endsoi' the C-shaped link is closed by the plates 4 and 5 and held in this position by means of the latch 8 and the locking dog 12. lWhenever it is desired to remove either the hook or swivel which is adaptedvto be supported by the link l, the locking dog 12is swungv on its pivot 13 out of engagement with the notch lland by raising upwardly on the handle 10, the latch may be disengaged from Vthe under side of the lip 3 and the plates lill and will further be strong- 'and durable. Furthermore, the parts are so arranged as to be readily actuated and will save considerable time and labor in changingffrom a hook to a swivel in a manner which is well known in the ar-t of oil drilling.

While I have shown the preferred embodiment of my invention, it is to be understood that various changes .in the size, shape and arrangement oft' parts may be resorted to without departing from the spirit ,of the invention and the scope. of theappended claim.

I-Iaving thus described my invention, what I claim iszy A hook structure comprising'a link having spaced ends and provided at one end with an outstanding lip, and provided at its outer side and under the lip'with a recess, link plates pivotally connected with the opposite end portion of lthe link and adapted to bridge the space between the end portions and overlap the recess, a latch member pivotallv mounted between the free ends of the link plates and adapted to engage under the k'oi' the link plate.

- Intestiin'ony whereof I aiix my signature. 1

JEFF M. BLAIR. 

